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Search results for: NANOCELLULOSE PREPARATION
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SEPARATION AND PURIFICATION TECHNOLOGY
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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
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IEEE Antennas and Wireless Propagation Letters
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JOURNAL OF SEPARATION SCIENCE
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Bacterial nanocellulose as a microbiological derived nanomaterial
PublicationBacterial nanocellulose (BNC) is a nanofibrilar polymer produced by strains such as Gluconacetobacter xylinus, one of the best bacterial species which given the highest efficiency in cellulose production. Bacterial cellulose is a biomaterial having unique properties such as: chemical purity, good mechanical strength, high flexibility, high absorbency, possibility of forming any shape and size and many others. Such a large number...
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IET Microwaves Antennas & Propagation
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Mechanical Properties of Bio-Composites Based on Epoxy Resin and Nanocellulose Fibres
PublicationThe aim of our research was to investigate the effect of a small nanocellulose (NC) addition on an improvement of the mechanical properties of epoxy composites. A procedure of chemical extraction from pressed lignin was used to obtain nanocellulose fibers. The presence of nanoparticles in the cellulose pulp was confirmed by FTIR/ATR spectra as well as measurement of nanocellulose particle size using a Zetasizer analyzer. Epoxy...
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The effect of dehydration/rehydration of bacterial nanocellulose on its tensile strength and physicochemical properties
PublicationBacterial nanocellulose (BNC) is a natural biomaterial with a wide range of biomedical applications. BNC contains 99 % of water which makes it too thick to be used as a bioimplant material. The aim of the work was to determine the effect of the BNC dehydration followed by rehydration on its mechanical and physicochemical properties, in the context of the use of BNC as bio-prostheses in the cardiovascular system. Dehydration involved the...
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Separation of anthocyanins from black carrot, chokeberry, blackcurrant, and elderberry with the use of preparative chromatography
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FILTRATION & SEPARATION
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Correlation between type of alkali rinsing, cytotoxicity of bio-nanocellulose and presence of metabolites within cellulose membranes
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Fabrication of Paper Sheets Coatings Based on Chitosan/Bacterial Nanocellulose/ZnO with Enhanced Antibacterial and Mechanical Properties
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Fabrication of Paper Sheets Coatings Based on Chitosan/Bacterial Nanocellulose/ZnO With Enhanced Antibacterial and Mechanical Properties
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In vitro biodegradation of bacterial nanocellulose under conditions simulating human plasma in the presence of selected pathogenic microorganisms
PublicationThe Biodegradability of bacterial nanocellulose (BNC) was assessed based on a change in its properties under conditions simulating human plasma in the presence or absence of the pathogens Staphylococcus aureus, Candida albicans and Aspergillus fumigatus. It was shown that the dry mass of BNC did not change during 6 months of incubation, except for samples stored in the presence of moulds, where the dry mass reduced by 40 %. The...
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Validation and Regulatory Issues for Sample Preparation in: Comprehensive Sampling and Sample Preparation
PublicationW rozdziale opisano podstawowe terminy związane z walidacja procedury analitycznej. Szczególnie zwrócono uwagę na etapy pobierania i przygotowania próbek do analizy. Podano także rolę i znaczenie poszczególnych składowych procesu kontroli i zapewnienia jakości wyników pomiarów analitycznych.
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Preparation of mounting mass
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Bacterial Nanocellulose Fortified with Antimicrobial and Anti-Inflammatory Natural Products from Chelidonium majus Plant Cell Cultures
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SEPARATION SCIENCE AND TECHNOLOGY
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OPTIMIZATION OF NASICON PREPARATION METHOD
PublicationNasicon is a solid conductor which has an ability to conduct Na+ ions and it is used in solid gas sensors. In this article a method of Nasicon preparation appropriate for gas sensing application by solgel technique is presented. Influence of the fabrication process parameters on properties of obtained samples was determined. Results of X-Ray diffraction, density, porosity, conductivity, and activation energies measurement are presented.
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Miniaturized methods of sample preparation
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Green sample preparation 2023
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Propagation of Ornamental Plants
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Preparation of Hydrogen Electrodes of Solid Oxide Cells by Infiltration: Effects of the Preparation Procedure on the Resulting Microstructure
PublicationIn this work, the infiltration technique was used to produce hydrogen electrodes for solid oxide cells. Different infiltration methodologies were tested in order to try to shorten the infiltration cycle time. The porous scaffolds used for infiltration were based on highly porous yttria-stabilized zirconia (YSZ) obtained by etching the reduced nickel from the Ni-YSZ cermet in HNO3 acid. The support had a complex structure which...
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Separation of Monovinyl and Divinyl Protochlorophyllides Using C30 Reverse Phase High Performance Liquid Chromatography Column: Analytical and Preparative Applications
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International Journal of Coal Preparation and Utilization
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Separation Science Plus
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Nanoparticles preparation using microemulsion systems
PublicationMetallic nanoparticles become of current interests because they exhibit unique properties compared with those of metal atoms or bulk metal due to the quantum size effect and their large surface area, which make them attractive for applications in optics, electronics, catalysis biology and medicine. TiO2 has been used for environmental remediation purposes such as in the purification of water and air and also solar-to chemical energy...
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Nanoparticles Preparation Using Microemulsion Systems
PublicationW rozdziale opisano otrzymywanie nanocząstek za pomocą metody mikroemulsyjnej oraz wpływ parametrów reakcji na powstawanie nanocząstek. Omówiono różne rodzaje struktur bimetalicznych - rdzeń-otoczka i stopowe.
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Preparation of Descriptive Geometry Course in English
PublicationW artykule przedstawiono wybrane różnice stosowane w zapisie konstrukcji geometrycznych w podręcznikach do geometrii wykreślnej w różnych krajach.
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Introductory Chapter: Evolution of Sample Preparation
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Preparation of exfoliated graphite by microwave irradiation
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Fatal intoxication with hydrocarbons in deltamethrin preparation
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Validation and Regulatory Issues for Sample Preparation
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Studies on the Preparation and Characterisation of Carbon Nanostructures
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Introductory Chapter: Evolution of Sample Preparation
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International Journal of Antennas and Propagation
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Advances in Sample Preparation
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A new and convenient method for the preparation of functionalized phosphorothioates
PublicationA new and efficient method for the synthesis of alkyl and aryl phosphorothioates in high yields via the reaction of (5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorin-2-yl)disulfanyl derivatives with trimethyl phosphite was developed.
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Preparation of samples for analysis: the key to analytical success
PublicationW rozdziale przedstawiono informacje literaturowe o nowych rozwiązaniach metodycznych w zakresie:-izolacji i/lub wzbogacania śladowych składników z próbek środowiskowych-mineralizacji próbek.Szczególna uwagę zwrócono na wykorzystanie w procesie przygotowania próbek nowych typów rozpuszczalników i mediów reakcyjnych spełniających wymogi związane z koncepcją zrównoważonego rozwoju.
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Preparation of silver nanoparticles with controlled particle size
PublicationNanocząstki srebra wykazują zdolność absorpcji promieniowania widzialnego, która jest efektem istnienia powierzchniowego plazmonu. W zależności od kształtu i wielkości cząstek obserwuje się różną barwę koloidów srebra. W wyniku przeprowadzonych badań otrzymano nanocząstki srebra metodą chemicznej redukcji. Zaobserwowano wpływ rodzaju reduktora (kwas askorbinowy, borowodorek sodu), stabilizatora (PVP, PVA) oraz prekursora srebra...
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Green Analytical Chemistry Approaches in Sample Preparation
PublicationThis chapter presents environmentally friendly solutions for sample preparation. Attention is focused on extraction techniques and the minimization of organic solvent consumption, as the large quantitiesused in analytical laboratories are a pressing environmental problem. Solventless sample preparation techniques, alternative solvents, mediated extractions are discussed. The principle of each technique isbriefly described, together...
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Preparation and characterization of rigid polyurethane-polyglycerolnanocomposite foams
PublicationThis work reports on the preparation of polyurethane-polyisocyanurate (PUR-PIR) foams containing different polyglycerols and layered silicate nanoclays. The rigid polyurethane foams were obtained in a laboratory scale, in a single step method, from a two-component system with a NCO to OH groups ratio equal to two. The reaction mixture consisted of the proper amounts of a commercial oligoetherpolyol, polyglycerol, catalysts, water,...
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A versatile and convenient preparation of unsymmetrical diaryl disulfides
PublicationWe have developed a convenient method for the synthesis of unsymmetrical diaryl disulfides under mild conditions in excellent yields. The described method is based on the straightforward preparation of 5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinane-2-sulfenyl bromide from readily available 5,5-dimethyl-2-thiolo-2-thioxo-1,3,2-dioxaphosphorinane or bis(5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-yl) disulfide. The unsymmetrical...
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Modern Sample Preparation Techniques: A Brief Introduction
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Green Aspects of Miniaturized Sample Preparation Techniques
PublicationCorrect monitoring and control of the state of the environment and scientific research on the subject of environmental protection often require that determinations of compounds present at very low concentrations be made in samples characterized by a matrix of complex composition (e.g., biological samples, water and soil samples). Moreover, due to the limited number of analytical techniques which are sufficiently sensitive to conduct...
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Preparation and characterisation of solution-cast Nafion membrane
PublicationNafion is a commercial name for a perfluorosulfonic polymer, which has been developed in 1962 by Dupont de Nemours. This polymer consists of a polytetrafluoroethylene backbone and regular spaced long perfluorovinyl ether pendant side chains terminated by a sulfonate ionic group. These sulfonate groups are responsible for cation-exchange properties of Nafion. Thanks to the ion-exchange properties, water permeability, good chemical,...
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Heteropolyanions doped polyimine—Preparation and spectroscopic properties
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Preparation and characterization of biopolymeric films with magnetic properties
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A new preparation method of catalyst for ammonia synthesis
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Preparation of samples of plant material for chromatographic analysis
PublicationPrzedstawiono informacje literaturowe nt. etapów przygotowania próbek materiału roślinnego do analizy chromatograficznej. Szczególną uwagę zwrócono na techniki izolacji i/lub wzbogacenie analitów przed etapem oznaczeń końcowych, walidację stosowanych procedur, sposoby pobierania próbek celem określenia emisji biogenicznej lotnych związków organicznych.